The two welcomed son Silas Randall Timberlake into the world, and reps say mom and baby are doing well and dad is “ecstatic.”

So what’s the story with this baby name, which feels much more traditional and less typically “Hollywood?” Turns out, Timberlake likes to keep the family names going strong! Well, Silas was the middle name of Timberlake’s maternal grandfather Bill Bomar, who died in 2012, while Randall is the musician’s own middle name, as well as his father’s first.

“Thank you EVERYONE for the Bday wishes! This year, I’m getting the GREATEST GIFT EVER. CAN’T WAIT,” he captioned a photo of himself kissing Biel’s bare baby belly.

According to Timberlake’s hashtags, the couple were making guesses as to the sex, after opting to keep it a delivery surprise. And it was! But now, time to get lil’ Timbs acclimated with the world! Congrats, you two!

Justin Timberlake and Jessica Biel are expecting their first child together- and shared the good news via Justin’s instagram. Check out the awesome instagram photo that is giving the world a perfect mix of genetic material after the jump!

During his Sunday night concert at the Barclays Center in Brooklyn, Timbs spotted a young fan wearing a suit in the crowd., and stopped the 10-year-old because he was trying to give him something. The fan gave the Suit and Tie singer a small wrapped present…his own snazzy bow tie.

JT, who is most likely probably expecting his first child with wife Jessica Biel, was touched.

“Hey man, greatest gift ever,” said a weepy Justin. “Because a gentleman can never have too many bowties. … I might have to wear that on Christmas day.